Recherche avancée

Sur d’autres sites (13618)

• Java Xuggler Metadata List of Chapters MP4/M4V Video

  27 juin 2017, par MrSax

  I’m trying to use Xuggler like FFMPEG Metadata Wrapper (I just need the list of Chapters of MP4/M4V Video).

  So far I have not been able to find a solution.
  Can anyone help me ?

  I was only able to get the following information :

      final String filename = "...path...";
  
      IContainer container = IContainer.make();
  
      int result = container.open(filename, IContainer.Type.READ, null);
  
      if (result < 0)
  
          throw new RuntimeException("Failed to open media file");
  
      int numStreams = container.getNumStreams();
  
      long duration = container.getDuration();
  
      long fileSize = container.getFileSize();
  
      long bitRate = container.getBitRate();
  
      System.out.println("Number of streams: " + numStreams);
  
      System.out.println("Duration (ms): " + duration);
  
      System.out.println("File Size (bytes): " + fileSize);
  
      System.out.println("Bit Rate: " + bitRate);
  
      for (int i = 0; i < numStreams; i++) {
  
          IStream stream = container.getStream(i);
  
          IStreamCoder coder = stream.getStreamCoder();
  
          System.out.println("*** Start of Stream Info ***");
  
          System.out.printf("stream %d: ", i);
  
          System.out.printf("type: %s; ", coder.getCodecType());
  
          System.out.printf("codec: %s; ", coder.getCodecID());
  
          System.out.printf("duration: %s; ", stream.getDuration());
  
          System.out.printf("start time: %s; ", container.getStartTime());
  
          System.out.printf("timebase: %d/%d; ", stream.getTimeBase().getNumerator(),
  
                  stream.getTimeBase().getDenominator());
  
          System.out.printf("coder tb: %d/%d; ", coder.getTimeBase().getNumerator(),
  
                  coder.getTimeBase().getDenominator());
  
          System.out.println();
  
          if (coder.getCodecType() == ICodec.Type.CODEC_TYPE_AUDIO) {
  
              System.out.printf("sample rate: %d; ", coder.getSampleRate());
  
              System.out.printf("channels: %d; ", coder.getChannels());
  
              System.out.printf("format: %s", coder.getSampleFormat());
  
          } else if (coder.getCodecType() == ICodec.Type.CODEC_TYPE_VIDEO) {
  
              System.out.printf("width: %d; ", coder.getWidth());
  
              System.out.printf("height: %d; ", coder.getHeight());
  
              System.out.printf("format: %s; ", coder.getPixelType());
  
              System.out.printf("frame-rate: %5.2f; ", coder.getFrameRate().getDouble());
  
          }
  
          System.out.println();
  
          System.out.println("*** End of Stream Info ***");

  UPDATE 07.06.2017
  I just tried it with VLCJ, but still I can not get the list of chapters.

      File file = new File("ia_ISL_13_r720P.m4v");
  
  
  
      NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(), "vlc64/");
  
      Native.loadLibrary(RuntimeUtil.getLibVlcLibraryName(), LibVlc.class);
  
  
  
      MediaPlayerFactory mpf = new MediaPlayerFactory();
  
      EmbeddedMediaPlayer emp = mpf.newEmbeddedMediaPlayer();
  
  
  
      MediaMeta mediaMeta = mpf.getMediaMeta(file.getAbsolutePath(), true);
  
      MediaMetaData asMediaMetaData = mediaMeta.asMediaMetaData();
  
      System.out.println(asMediaMetaData.getAlbum());
  
      System.out.println(asMediaMetaData.getArtist());
  
      System.out.println(asMediaMetaData.getTitle());
  
  
  
      emp.prepareMedia(file.getAbsolutePath());
  
      emp.play();
  
      emp.nextChapter(); // -> GO NEXT CHAPTER - SUCCESS
  
  
  
      List> allChapterDescriptions = emp.getAllChapterDescriptions();
  
  
  
      for (List<string> list : allChapterDescriptions) {
  
          for (String string : list) {
  
              System.out.println(string);
  
          }
  
      }
  
  </string>

• ValueError When Reading Video Frame

  28 juin 2017, par Bassie

  I am following this article, from where I got this code :

  FFMPEG_BIN ="Z:\ffmpeg\bin\ffmpeg.exe"
  
  
  
  import subprocess as sp
  
  command = [ FFMPEG_BIN,
  
              '-i', 'video.mp4',
  
              '-f', 'image2pipe',
  
              '-pix_fmt', 'rgb24',
  
              '-vcodec', 'rawvideo', '-']
  
  pipe = sp.Popen(command, stdout = sp.PIPE, bufsize=10**8, shell=True)
  
  
  
  import numpy
  
  # read 420*360*3 bytes (= 1 frame)
  
  raw_image = pipe.stdout.read(420*360*3)
  
  # transform the byte read into a numpy array
  
  image =  numpy.fromstring(raw_image, dtype='uint8')
  
  image = image.reshape((360,420,3))
  
  # throw away the data in the pipe's buffer.
  
  pipe.stdout.flush()

  When I run it I see this error :

  Traceback (most recent call last):
  
    File "Z:\py\ffmtest\test.py", line 16, in <module>
  
      image = image.reshape((360,420,3))
  
  ValueError: total size of new array must be unchanged
  
  </module>

  Where line 16 is image = image.reshape((360,420,3)). I think this error is produced by numpy, but probably because I am calculating the values for my video incorrectly.

  Output :

  raw_image : b’ ’

  len(raw_image) : 0

  image : [ ]

  len(image) : 0

  I am not sure whether I am passing in the correct values for read or reshape functions - any help at all is much appreciated !

• ffmpeg Unrecognized option 'hls_enc'

  16 juin 2017, par riubin

  Does anyone have a ffmpeg problem that Unrecognized option ’hls_enc’ ?

  when I use ffmpeg to convert videos to hls with option ’hls_enc’,followed the document : https://www.ffmpeg.org/ffmpeg-formats.html#Options-5
  but throw error:Unrecognized option ’hls_enc’

  Is it missing any configure options ?

  configuration : —enable-gpl —enable-nonfree —yasmexe=/data/ffmpeg.src/_release/bin/yasm —prefix=/data/ffmpeg.src/_release —cc= —enable-static —disable-shared —enable-debug —extra-cflags=’-I/data/ffmpeg.src/_release/include’ —extra-ldflags=’-L/data/ffmpeg.src/_release/lib -lm -ldl’ —enable-postproc —enable-bzlib —enable-zlib —enable-parsers —enable-pthreads —enable-libx264 —enable-libmp3lame —enable-libfdk_aac —enable-libspeex —extra-libs=-lpthread —enable-encoders —enable-decoders —enable-avfilter —enable-muxers —enable-demuxers